msi: Add tests for [un]registering progids.

[Marvin]

Hi,

While running your changed tests on Windows, I think I found new failures.
Being a bot and all I'm not very good at pattern recognition, so I might be
wrong, but could you please double-check?
Full results can be found at
https://newtestbot.winehq.org/JobDetails.pl?Key=5134

Your paranoid android.


=== w2000pro (32 bit action) ===
action.c:6337: Test failed: Expected ERROR_SUCCESS, got 1603
action.c:6343: Test failed: key not created
action.c:6347: Test failed: key not created
action.c:6351: Test failed: key not created
action.c:6355: Test failed: key not created
action.c:6359: Test failed: key not created
action.c:6363: Test failed: key not created
action.c:6381: Test failed: Expected ERROR_SUCCESS, got 1605

=== wxppro (32 bit action) ===
action.c:6337: Test failed: Expected ERROR_SUCCESS, got 1603
action.c:6343: Test failed: key not created
action.c:6347: Test failed: key not created
action.c:6351: Test failed: key not created
action.c:6355: Test failed: key not created
action.c:6359: Test failed: key not created
action.c:6363: Test failed: key not created
action.c:6381: Test failed: Expected ERROR_SUCCESS, got 1605